VSC7440 datasheet(94/444 Pages) MICROSEMI

94 / 444 page

Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

LBL1

MPLS Label Stack entry 1 - Label.

TC1

MPLS Label Stack entry 1 - TC bits.

SBIT1

MPLS Label Stack entry 1 - S-bit.

TTL1_EXPIRY

Set if TTL<=1 for MPLS Label Stack entry 1.

RSV_LBL_POS

Reserved label position:

0: Reserved label at position 0 seen or skipped.

1: Reserved label at position 1 seen or skipped.

2: Reserved label at position 2 seen or skipped.

3: Reserved label at position 3 seen.

4: Reserved.

5: No reserved label seen.

Label at top of stack is position 0, followed by 1, 2, and 3.

In order for a reserved label to be skipped, either

ANA_CL::MPLS_RSV_LBL_CFG[<label>].RSVD_LBL_SKIP_ENA or

ANA_CL::MPLS_MISC_CFG.CLM_RSVD_LBL_SKIP_ENA[<clm idx>]

must be set.

OAM_Y1731

Set if frame's EtherType = 0x8902.

OAM_MEL_FLAGS

Encoding of MD level/MEG level (MEL). One bit for each level where

lowest level encoded as zero.

The following keys can be generated:

MEL=0: 0x0000000

MEL=1: 0x0000001

MEL=2: 0x0000011

MEL=3: 0x0000111

MEL=4: 0x0001111

MEL=5: 0x0011111

MEL=6: 0x0111111

MEL=7: 0x1111111

Together with the mask, the following kinds of rules may be created:

- Exact match. Fx. MEL=2: 0x0000011

- Below. Fx. MEL<=4: 0x000XXXX

- Above. Fx. MEL>=5: 0xXX11111

- Between. Fx. 3<= MEL<=5: 0x00XX111,

where 'X' means don't care.

Overloading:

For non-Y1731 OAM frames (OAM_Y1731 = 0), OAM_MEL_FLAGS

encodes an EtherType identifier:

0: IPv4frame (EtherType = 0x0800)

1: IPv6 frame (EtherType = 0x86DD)

2: Downstream assigned label (EtherType = 0x8847)

3: Upstream assigned label (EtherType = 0x8848)

4: LCC/SNAP (EtherType < 0x0600)

5: (R)ARP (EtherType = 0x0806 or 0x8035)

6: Reserved

7: Other

Table 60 •

VCAP CLM X2 Key Details (continued)

Field Name

Description

Size

VSC7440 датащи(PDF) 94 Page - Microsemi Corporation

VSC7440 датащи(HTML) 94 Page - Microsemi Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL